Supplementary file 1_Psychometric revalidation of the SPRINT-E scale for assessing post-traumatic stress in Latin American populations during the COVID-19 pandemic.docx

IntroductionPost-traumatic stress disorder (PTSD) has been one of the major psychological consequences observed during and after the COVID-19 pandemic. Therefore, it is essential to have valid and reliable instruments for its assessment.
ObjectiveTo evaluate the internal structure and reliability of a brief SPRINT-E-based measure for screening post-traumatic stress symptoms in Latin American populations during the early phase of the COVID-19 pandemic.
MethodsThis was an instrumental study using the Short Posttraumatic Stress Disorder Rating Interview (SPRINT-E) scale, administered to more than 6,000 participants across 12 Latin American countries. Descriptive statistics and confirmatory factor analysis (CFA) were conducted to evaluate the factorial structure and internal consistency of the instrument.
ResultsItem 4 showed the highest mean score (M = 0.85) and the greatest dispersion (SD = 0.78). The CFA supported the original unidimensional 12-item model, which demonstrated satisfactory goodness-of-fit indices. The PTSD-COVID-19 scale showed a Cronbach’s α of 0.92 (95% CI: 0.91–0.92), indicating excellent internal consistency.
ConclusionThe PTSD-COVID-19 scale showed acceptable evidence of internal structure and excellent internal consistency as a brief instrument for screening post-traumatic stress symptoms in Latin American adults during the early phase of the COVID-19 pandemic.

引言
创伤后应激障碍（Post-traumatic Stress Disorder, PTSD）是新冠疫情期间及疫情后观测到的主要心理后果之一。因此，开发具备良好效度与信度的评估工具至关重要。

研究目的
本研究旨在评估基于简短版创伤后应激障碍评定访谈（Short Posttraumatic Stress Disorder Rating Interview, SPRINT-E）的筛查量表的内部结构与信度，该量表用于新冠疫情早期阶段拉丁美洲人群的创伤后应激症状筛查。

研究方法
本研究为工具性研究，采用简短版创伤后应激障碍评定访谈（SPRINT-E）量表，对12个拉丁美洲国家的6000余名参与者进行施测。研究通过描述性统计与验证性因子分析（Confirmatory Factor Analysis, CFA），评估该工具的因子结构与内部一致性。

研究结果
第4条目得分均值最高（M=0.85），离散程度最大（SD=0.78）。验证性因子分析支持原始的单维12条目模型，该模型展现出优异的拟合优度指标。本次研究的新冠创伤后应激障碍（PTSD-COVID-19）量表的克朗巴赫α系数（Cronbach’s α）为0.92（95%置信区间：0.91–0.92），表明其内部一致性极佳。

研究结论
新冠创伤后应激障碍（PTSD-COVID-19）量表作为简短筛查工具，在新冠疫情早期阶段用于拉丁美洲成年人的创伤后应激症状筛查时，其内部结构与内部一致性均表现出可接受的证据与优异的性能。